What is the interested rate of 10% per year, Compunded (Annually) ? By using Formula, Don't use Excel !!

---------------------

Solve it using Formulas no Excel please !!!

Question: Periodic outlays for inventory control software at Baron Chemicals are expected to be $150,000 immediately, $200,000 in 1 year, and $350,000 in 2 years. What is the present worth of the costs at an interest rate of 10% per year.compounded continuossly? Step 1 of1 4.53 i =e""-1 P 1 50,000 + 200,000(P/F, 10.51 796, 1 ) + 350,000 (PF, 1 0.5 1 7%,2) Find factor values by interpolation, formula, or spreadsheet. P = 150,000 +200,000(09048) +350,000(08187) =0.105 17 or 10.517% per year = $617,505